Not that it matters to anyone, but I will chime in and add my two cents worth:
I agree with DmonSlyr and TryHard to an extent, and think that the late war planes should carry some perk cost, and that once you hit the runway, those perks are spent, kapoot, gone, not matter if you land or die on that sortie.
I have flown the Yak3 on a few occasions, and it feels to me like it does make getting kills a lot easier. From taking off at a base under attack and getting kills within less than a minute due to the plane's performance, to venturing out just looking for a fight and being able to outperform an opponent simply due to the plane's performance.......it is not an invincible plane by any means, let's just say it enables a pilot to make more mistakes and not get killed in the process than other planes in the plane set.
I, too, have noticed an abundance of late war planes in the skies, and while it really doesn't bother me that much (I routinely fly a ME410, EVERYTHING outclasses that truck) and I expect to die any time I run into a single seat fighter, it seems kinda weird to me to see so many of the elite pilots depending on a perk ride as a crutch. It's almost like none of them want a challenge, they want the deck stacked in their favor each and every flight and fight.
Oh well, to each his own................but I personally get more satisfaction getting my kills in a non-perk ride, seems like it makes it more of a pilot/skill factor than the fastest ride.